111020120203 has 4 divisors (see below), whose sum is σ = 114848400240. Its totient is φ = 107191840168.

The previous prime is 111020120191. The next prime is 111020120207. The reversal of 111020120203 is 302021020111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111020120203 - 2¹³ = 111020112011 is a prime.

It is a super-2 number, since 2×111020120203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111020120207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914139975 + ... + 1914140032.

It is an arithmetic number, because the mean of its divisors is an integer number (28712100060).

Almost surely, 2^111020120203 is an apocalyptic number.

111020120203 is a deficient number, since it is larger than the sum of its proper divisors (3828280037).

111020120203 is an equidigital number, since it uses as much as digits as its factorization.

111020120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828280036.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 111020120203 its reverse (302021020111), we get a palindrome (413041140314).

The spelling of 111020120203 in words is "one hundred eleven billion, twenty million, one hundred twenty thousand, two hundred three".